Union Catalogue of Agricultural Libraries in the Netherlands
The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.
Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.
The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.
As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".
All titles are entered in their original language. Keywords are added to facilitate subject searching.
The database is updated every day and now contains over 830.000 records.
Cassava was shown not to require deep tillage. The influence of planting time was very great. The optimum time could be easily established by experiments. Closer spacing diminished root production per plant but this loss was compensated by the larger number of plants. Only very wide spacing notably diminished yield. Planting deeper than 2 in. diminished meal yields. Cuttings from gardens 17.5 months old proved better than from gardens 19.5 and 24.5 months old. The removal of stems from the plantations for the making of cuttings gave a meal loss of 8 to 9 % if one stem was left on each plant and one of 10 to 16 Y. if all stems were cut. Cutting 5 months before harvesting caused slightly less setback than 9 months before it. The influence of fertilization was rarely marked (K, P) or almost negligible (N, Ca). Green manuring had no influence. An optimum age period for ripeness could be established. Seven varieties could be ranged according to their productivity, as also 7 seedlings selected by Koch.
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